摘要
本文针对丢包为分段伯努利过程的无线网络化控制系统进行了控制器设计和稳定性分析。丢包满足分段伯努利过程是指未知丢包率将在未知时刻突变到另一个未知概率上并保持一段时间。针对这一丢包特点,本文提出了基于丢包率估计的逼近控制策略以保证系统稳定性。首先设计了丢包率估计器和逼近控制器,使系统在线估计丢包率,并利用丢包率估计得到控制量。然后为平衡系统性能和网络信道资源设计了信道调度机制。最后设计了丢包率突变检测器使系统自适应丢包率突变。在此基础上得到了保证闭环系统均方最终一致有界的充分条件和控制增益计算方法。数值仿真验证了控制策略的有效性。
The control design and stability analysis of wireless networked control systems with piecewise Bernoulli process packet loss rate are investigated.The piecewise Bernoulli process means that the packet loss rate will switch to another unknown probability suddenly at unknown time and remains there for a certain time period.To deal with this characteristic,an estimation based approximating control strategy is proposed.First,a packet loss rate estimator and an approximating controller are designed to obtain the packet loss rate estimation.Then,a channel selection mechanism is designed to balance the control performance and the network channel utilization.Finally,a packet loss rate sudden change detector is designed to make the systems adapt to such a sudden change.On this basis,the sufficient conditions to ensure the closed-loop system being mean-square uniformly ultimately bounded are given,along with the controller gain design method.The effectiveness of the proposed approach is verified numerically.
作者
吴芳
梁启鹏
叶睿卿
赵云波
WU Fang;LIANG Qipeng;YE Ruiqing;ZHAO Yunbo(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023)
出处
《高技术通讯》
CAS
2023年第3期271-279,共9页
Chinese High Technology Letters
基金
科技创新2030—“新一代人工智能”重大项目(2018AAA0100800)
安徽省重点研发计划(202104a05020064)资助项目。
关键词
无线网络化控制
丢包率估计
分段伯努利过程
逼近控制器
wireless networked control
packet loss rate estimate
piecewise Bernoulli process
approximating controller
